... aquaculture,household , Hemetic anti-corrosion housingSplit type water source heat pump The water to water heat pump applies ... of aquaculture ,household and hot water producing . The water source at inlet could be river water, sea water , underground ... abundantly ( COP : above 4.0 w/w) . Water source heat pump (main unit) MAIN UNIT Model NSSDR-NSSDR030NSSDR078NSSDR137NSSDR165HORSE POWERHP1356COOLING ...